Automatic Localization and Boundary Detection of Optic Disc Using Implicit Active Contours

Siddalingaswamy, PC and Prabhu, G K (2010) Automatic Localization and Boundary Detection of Optic Disc Using Implicit Active Contours. International Journal of Computer Applications, 7 (1). ISSN 0975 – 8887

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Official URL: http://www.ijcaonline.org/archives/number7/171-298

Abstract

An efficient detection of Optic disc in colour retinal images is the fundamental step in an automated retinal image analysis system. This paper presents a new approach for the automatic localization and accurate boundary detection of the optic disc. Iterative thresholding method followed by connected component analysis is employed to locate the approximate center of the optic disc. Then geometric model based implicit active contour model is applied to find the exact boundary of the optic disc. The method is evaluated against a carefully selected database of 148 retinal images and compared with the human expert. The optic disc is localized with an accuracy of 99.3%. The sensitivity and specificity of boundary detection achieved in terms of Mean±SD are 90.67±5 and 94.06±5 respectively.

Item Type: Article
Additional Information: © IJCA Journal
Uncontrolled Keywords: Optic disc segmentation;Iterative thresholding;Geometric active contours
Subjects: Engineering > MIT Manipal > Biomedical
Engineering > MIT Manipal > Computer Science and Engineering
Depositing User: MIT Library
Date Deposited: 25 Apr 2011 05:26
Last Modified: 17 Jun 2011 04:07
URI: http://eprints.manipal.edu/id/eprint/3

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